Prior to the Pink Sheets in the early 1900’s, over the counter markets were completely fragmented. Up until 1999 the OTC stock prices (the buy and sell prices) were printed on pink colored sheets of paper and sent to stock brokerage firms and investment houses. That is why the investment community used the term Pink Sheets.
There are 2 kinds of public shells. There is a big difference between them. One can help speed up the process to become a public. These are called virgin or blank check companies. A Securities and Exchange Commission reporting blank check company is a public shell. They have no operating history and are formed to become SEC reporting public companies to find and merge with a private company. Many investment banks and consultants use this type of public shell company to merge a client into since some funding sources require a company to be public before they can invest.